hot-sale osp pcb immersion bulk production for wholesale

Company Advantages
1. A-TECH osp pcb is treated with professional dying technique. The coloring agent is evenly distributed to the materials by the means of mechanical heating method.
2. The stipulate strict quality inspection through the whole process guarantees the product is of the quality that meets the industry standard.
3. The application of carbon ink pcb gives rise to the greater performance of osp pcb .
4. A-TECH CIRCUITS Co., Ltd. aims to provide clients with competitively priced osp pcb .
5. As a dominant osp pcb supplier, A-TECH focus on its customer service.

Immersion Tin, or Chemical Tin, it’s a RoHS Compliant metallic finish deposited by a chemical displacement reaction that is applied directly over the basis metal of the circuit board, the immersion Tin protects the underlying copper from oxidation over it’s intended shelf life, copper and tin however have a strong affinity for one another, the diffusion of one metal into the other will occur inevitably, directly impacting the shelf life of the deposit and the performance of the finish. The negative effects of tin whiskers growth are well described in industry related literature and topics of several published papers.

The typical thickness of Immersion Tin is ≥1.0UM and the shelf life is 6 months. The cost of Immersion Tin is more expensive than HASL but less expensive than Immersion Gold and close to Immersion Silver. Similar to Immersion Silver, Immersion Tin is also sensitive in handling and storage, it requires PCB manufacturers to control and pack PCBs with Imm Tin more carefully.

The advantages of Immersion Tin

● Excellent flatness
● Mid range cost for lead free finish
● Good for fine pitch / BGA / smaller components
● Top choice for press fit technology
● Reworkable

The disadvantages of Immersion Tin

● Very sensitive to handling – gloves must be used
● Exposed Tin on final assembly can corrode
● Not good for multiple reflow/assembly processes
● Aggressive to soldermask – soldermask dam should be more than 5mil
● Baking prior to use can have a negative effect

A-TECH is capable of using Immersion Tin, we make the profile and electrical test before the process of Immersion Tin finish, and we use papers to separate each piece of boards to avoid scratches during package and transportation.

Company Features
1. A-TECH CIRCUITS Co., Ltd. stands out than other enterprises in the osp pcb field.
2. A-TECH CIRCUITS Co., Ltd. has ISO9001:2000 quality system certification, with strict and perfect quality assurance system.
3. A-TECH intends to be a global immersion gold pcb exporter. Call! A-TECH CIRCUITS Co., Ltd. always adhere to the 'customer first'. Call! With the great fantasy of becoming an outstanding carbon pcb maker, A-TECH will work harder to enhance customer satisfaction. Call! A-TECH CIRCUITS Co., Ltd. will enhance the reputation of enig pcb products. Call!